Bingham, Frank G.
NTC/Contemporary Publishing Group, 2001
Buku Teks
Westing, John Howard
John Wiley & Sons, 1956
Buku Teks
Hutt, Michael D.
South Western Cengage Learning, 2013
Buku Teks
Gary L. Lilien, editor
Edward Elgar, 2012
Buku Teks
Webster, Frederick E.
Prentice-Hall, 1972
Buku Teks